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<span lang="EN-US">幾何学分科会-ML</span>の皆様<span lang="EN-US"> </span>,<span lang="EN-US"><o:p> </o:p></span></p>
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<span lang="EN-US"><o:p> </o:p></span></p>
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<span lang="EN-US">9</span>月<span lang="EN-US">24</span>日(金)に立命館大学幾何学セミナーをオンライン開催しますので,ご案内申し上げます.<span lang="EN-US">
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</span>ご参加される際には事前登録が必要ですので,<span lang="EN-US">9</span>月<span lang="EN-US">23</span>日(木)までに下記の<span lang="EN-US">URL</span>よりご登録ください.
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</span>どうぞよろしくお願いします.<span lang="EN-US"><o:p> </o:p></span></p>
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<span lang="EN-US"><<</span>立命館大学幾何学セミナー<span lang="EN-US">>><br>
</span>日時:<span lang="EN-US">2021</span>年<span lang="EN-US">9</span>月<span lang="EN-US">24</span>日(金)<span lang="EN-US"> 16:30</span>~<span lang="EN-US">17:30<br>
</span>タイトル:<span lang="EN-US">Factoring periodic maps into Dehn twists <br>
</span>講演者:<span lang="EN-US">Neeraj Kumar Dhanwani</span>(<span lang="EN-US">IISERB</span>)<span lang="EN-US"><br>
</span>アブストラクト:<span lang="EN-US"><br>
Let Mod(Sg) be the mapping class group of the closed orientable surface Sg of genus g ≥ 1. In this talk, we will discuss various methods for expressing periodic mapping classes as a product of Dehn twists, up to conjugacy. These methods are based on the chain
and star relations in mapping class group, the geometric realizations of cyclic actions, and the symplectic representations of periodic elements. As an application, we will describe a method to write the roots of Dehn twists as words in Dehn twists. Finally,
we will show that the periodic mapping classes of orders 4g and 4g + 2 have conjugates whose product is pseudo-Anosov.
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開催方法:<span lang="EN-US">Zoom</span>ミーティングでの開催です.次のリンクより<span lang="EN-US">9</span>月<span lang="EN-US">23</span>日(木)までにご登録ください:<span lang="EN-US"><o:p> </o:p></span></p>
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<span lang="EN-US">https://ritsumei-ac-jp.zoom.us/meeting/register/tJUuc-itrzwjH9LgwRMpT2JhkdksYKeUXuGO<o:p> </o:p></span></p>
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<span lang="EN-US">*</span>登録後、ミーティング参加に関する情報の確認メールが届きます。<span lang="EN-US"><o:p> </o:p></span></p>
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高橋典寿<span lang="EN-US"><o:p> </o:p></span></p>
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